231220114981 has 2 divisors, whose sum is σ = 231220114982. Its totient is φ = 231220114980.

The previous prime is 231220114963. The next prime is 231220114999. The reversal of 231220114981 is 189411022132.

It is a balanced prime because it is at equal distance from previous prime (231220114963) and next prime (231220114999).

It can be written as a sum of positive squares in only one way, i.e., 195599214756 + 35620900225 = 442266^2 + 188735^2 .

It is a cyclic number.

It is not a de Polignac number, because 231220114981 - 2⁵ = 231220114949 is a prime.

It is a super-2 number, since 2×231220114981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231220114901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115610057490 + 115610057491.

It is an arithmetic number, because the mean of its divisors is an integer number (115610057491).

Almost surely, 2^231220114981 is an apocalyptic number.

It is an amenable number.

231220114981 is a deficient number, since it is larger than the sum of its proper divisors (1).

231220114981 is an equidigital number, since it uses as much as digits as its factorization.

231220114981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 231220114981 in words is "two hundred thirty-one billion, two hundred twenty million, one hundred fourteen thousand, nine hundred eighty-one".